CN220154309U - Microwave solution sensor and detection system thereof - Google Patents
Microwave solution sensor and detection system thereof Download PDFInfo
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- CN220154309U CN220154309U CN202321273208.1U CN202321273208U CN220154309U CN 220154309 U CN220154309 U CN 220154309U CN 202321273208 U CN202321273208 U CN 202321273208U CN 220154309 U CN220154309 U CN 220154309U
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- 238000001514 detection method Methods 0.000 title claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 27
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 27
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 27
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 26
- 239000010452 phosphate Substances 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 238000003491 array Methods 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 54
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000011259 mixed solution Substances 0.000 claims description 15
- 238000000520 microinjection Methods 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 239000004809 Teflon Substances 0.000 claims description 3
- 229920006362 Teflon® Polymers 0.000 claims description 3
- 238000004378 air conditioning Methods 0.000 claims 6
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 4
- 239000010842 industrial wastewater Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- 229960005070 ascorbic acid Drugs 0.000 description 2
- 235000010323 ascorbic acid Nutrition 0.000 description 2
- 239000011668 ascorbic acid Substances 0.000 description 2
- 239000007853 buffer solution Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- 238000011895 specific detection Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000513 principal component analysis Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model relates to a microwave solution sensor and a detection system thereof. A microwave solution sensor comprising a substrate and a plurality of SRR resonators of different specifications, further comprising: the transmission line is arranged on the substrate, and a plurality of SRR resonator arrays are arranged on the transmission line; the micro-fluidic channel is arranged on the substrate and is positioned on one side of the transmission line, the micro-fluidic channel comprises a plurality of detection flow channels, and a liquid inlet and a liquid outlet which are arranged at two ends of the detection flow channels, and the detection flow channels are arranged opposite to the SRR resonator and are used for detecting the concentration of nitrate and phosphate of the solution in the detection flow channels. The microwave solution sensor provided by the utility model can detect nitrate and phosphate in real time, in a trace quantity and in a non-contact manner, has high detection sensitivity and high detection speed, is not interfered by other environmental factors, and has accurate and reliable detection results.
Description
Technical Field
The utility model relates to a sensor, in particular to a microwave solution sensor and a detection system thereof.
Background
Part of industrial wastewater is mixed liquor containing nitrate and phosphate, and the concentration of the nitrate and the phosphate is required to be detected during the treatment of the industrial wastewater. The comprehensive automatic analyzer for nitrate, nitrite, orthophosphate, silicate and ammonia nitrogen in water disclosed in CN214374308U comprises an automatic sampler, a solution conveying part, a chemical reaction part and a detector, wherein the automatic sampler is connected with the solution conveying part through a pipeline, the solution conveying part is connected with the chemical reaction part through a pipeline, the automatic sampler is used for sucking liquid to be detected, the solution conveying part is used for conveying the liquid to be detected, current carrying, a color developing agent, sodium hypochlorite and buffer solution/ascorbic acid to the chemical reaction part respectively, and the chemical reaction part is used for sequentially mixing the liquid to be detected, the current carrying, the color developing agent, the sodium hypochlorite and the buffer solution/ascorbic acid to obtain a mixed solution and inputting the mixed solution into the detector, and the detector is used for detecting the absorbance of the mixed solution. The method is low in detection efficiency and high in cost through chemical reaction detection, and cannot be detected in real time.
Disclosure of Invention
In order to solve the problems, the utility model provides a microwave solution sensor capable of carrying out micro, real-time and non-contact specific detection on a mixed salt solution of nitrate and phosphate, which comprises the following specific technical scheme:
a microwave solution sensor comprising a substrate and a plurality of SRR resonators of different specifications, further comprising:
the transmission line is arranged on the substrate, and a plurality of SRR resonator arrays are arranged on the transmission line; the micro-fluidic channel is arranged on the substrate and positioned on one side of the transmission line, and comprises a plurality of detection flow channels, and a liquid inlet and a liquid outlet which are arranged at two ends of the detection flow channels, wherein the detection flow channels are arranged opposite to the SRR resonator and are used for detecting the concentration of nitrate and phosphate of a solution in the detection flow channels.
Preferably, the detection flow channel includes: the first flow passage is communicated with the liquid inlet; a second flow passage, the second flow passage communicating with the first flow passage; the third flow passage is respectively communicated with the second flow passage and the liquid outlet; the first flow channel, the second flow channel and the third flow channel are concave, and the widths of the first flow channel, the second flow channel and the third flow channel are sequentially reduced and are sequentially arranged along the transmission line;
the SRR resonators are arranged in three and are respectively in one-to-one correspondence with the first flow passage, the second flow passage and the third flow passage.
Preferably, the SRR resonator includes a first resonator, a second resonator, and a third resonator with sequentially increased frequencies, where the first resonator, the second resonator, and the third resonator are in one-to-one correspondence with the first flow channel, the second flow channel, and the third flow channel, respectively.
Further, the frequencies of the first resonator, the second resonator and the third resonator are 5-6 GHz, 4-5 GHz and 3-4 GHz respectively.
Preferably, the method further comprises: the first channel is respectively communicated with the first flow channel and the liquid inlet; the second channel is communicated with the bottom of the first flow channel and the bottom of the second flow channel respectively; and the third channel is respectively communicated with the top of the second channel and the top of the third channel.
Preferably, the method further comprises: the clear water inlet is communicated with the microfluidic channel and is used for introducing cleaning liquid to clean the microfluidic channel; and the air inlet is communicated with the microfluidic channel and is used for introducing air to dry the microfluidic channel.
Further, the method further comprises the following steps: the detection inlet and the liquid inlet are used for respectively introducing nitrate solution and phosphate solution; the liquid storage tank is communicated with the microfluidic channel, and the liquid inlet, the detection inlet, the clear water inlet and the air inlet are all communicated with the liquid storage tank; the clean water inlet is used for introducing deionized water, and the liquid storage tank is used for mixing the nitrate solution, the phosphate solution and the deionized water to obtain a mixed solution of nitrate and phosphate with preset concentration.
Preferably, the substrate is a teflon substrate.
A microwave solution detection system, comprising: a microwave solution sensor as described above; the vector network analyzer is connected with two ends of the transmission line; and the microinjection pump is connected with the liquid inlet.
Compared with the prior art, the utility model has the following beneficial effects:
the microwave solution sensor provided by the utility model can detect nitrate and phosphate in real time, in a trace quantity and in a non-contact manner, has high detection sensitivity and high detection speed, is not interfered by other environmental factors, and has accurate and reliable detection results.
Drawings
FIG. 1 is a schematic diagram of a microwave solution sensor;
FIG. 2 is a front view of a microwave solution sensor;
FIG. 3 is a schematic diagram of the structure of the detection flow channel;
FIG. 4 is a simulation diagram of a microwave solution sensor;
fig. 5 is a spectrum diagram, a phase diagram, and a PCA principal component analysis diagram based on both of the mixed solution detection of nitrate and phosphate.
Detailed Description
The utility model will now be further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 3, a microwave solution sensor includes a substrate 1, an SRR resonator, a transmission line 2, and a microfluidic channel 4.
The substrate 1 is a Teflon plate, a copper plating layer is arranged on the substrate 1, a strip-shaped transmission line 2 is formed by the copper plating layer, SRR resonators are mounted on the transmission line 2 and are sequentially arranged along the length direction, each SRR resonator comprises a first resonator 31, a second resonator 32 and a third resonator 33, the frequency of the first resonator 31 is 3-4 GHz, the frequency of the second resonator 32 is 4-5 GHz, and the frequency of the third resonator 33 is 5-6 GHz.
The detection flow channel comprises a first flow channel 41, a second flow channel 42 and a third flow channel 43 which are sequentially arranged, wherein the first flow channel 41, the second flow channel 42 and the third flow channel 43 are concave, the widths of the first flow channel 41, the second flow channel 42 and the third flow channel 43 are sequentially reduced, and the detection flow channel is sequentially arranged along the transmission line 2. The first resonator 31, the second resonator 32, and the third resonator 33 are in one-to-one correspondence with the first flow passage 41, the second flow passage 42, and the third flow passage 43, respectively. The concave detection flow channel enables the mixed solution to be detected to flow through the optimal sensing area of the microwave sensor as much as possible, and high-sensitivity detection is achieved.
The microfluidic channel 4 further comprises a first channel 461, a second channel 462 and a third channel 463, wherein the first channel 461 is respectively communicated with the top of one end of the first channel 41 and the liquid inlet 44; the second passage 462 communicates with the bottom of the other end of the first flow path 41 and the bottom of one end of the second flow path 42, respectively; the third channel 463 communicates with the top of the other end of the second flow path 42 and the top of one end of the third flow path 43, respectively; the bottom of the other end of the third flow channel 43 is communicated with a liquid outlet 45.
The detection flow channel is arranged opposite to the SRR resonator and is used for detecting the concentration of nitrate and phosphate of the solution in the detection flow channel.
Three SRR resonators with the same structure and different sizes are coupled to the transmission line 2 to construct an SRR microwave sensor array, so that the SRR microwave sensor array works in different frequency bands of 3-6GHz respectively. As shown in fig. 4, the microfluidic channel 4 makes the mixed solution to be tested pass through the sensitive area of the SRR resonator array as much as possible, so as to improve the detection sensitivity.
During detection, mixed liquid containing phosphate and nitrate enters the microfluidic channel 4 through the liquid inlet 44, then sequentially passes through the first flow channel 41, the second flow channel 42 and the third flow channel 43, and the first resonator 31, the second resonator 32 and the third resonator 33 detect the solutions in the first flow channel 41, the second flow channel 42 and the third flow channel 43 respectively, so that the accurate concentration of the nitrate and the phosphate can be obtained through multiple detection.
In order to facilitate cleaning the sensor, prevent pollution and ensure accuracy, the device also comprises a clean water inlet 47 and an air inlet 48, wherein the clean water inlet 47 is communicated with the microfluidic channel 4 and is used for introducing cleaning liquid to clean the microfluidic channel 4; the air inlet 48 communicates with the microfluidic channel 4 for air to dry the microfluidic channel 4. The liquid inlet 44, the clean water inlet 47 and the air inlet 48 are all communicated with one end of the microfluidic channel 4. And after the detection is finished, introducing clear water, cleaning the microfluidic channel 4 by the clear water, and after the cleaning is finished, introducing dry air to dry the microfluidic channel 4. The aperture of the microfluidic channel 4 is small, and blockage is easily caused by no cleaning, so that the microwave is easily scrapped.
The SRR resonator is a split ring resonator (Split Ring Resonator).
Example two
As shown in fig. 1 to 3, in order to facilitate the detection of the accuracy of the microwave solution sensor and to facilitate the calibration, the device further comprises a detection inlet 49 and a liquid storage tank 40, wherein the liquid storage tank 40 is communicated with the microfluidic channel 4, and the liquid inlet 44, the detection inlet 49, the clean water inlet 47 and the air inlet 48 are all communicated with the microfluidic channel 4 through the liquid storage tank 40.
The detection inlet 49 and the liquid inlet 44 are used for respectively introducing nitrate solution and phosphate solution; the liquid storage tank 40 is used for mixing the solution to obtain the mixed solution with the required degree of flexibility, and as the concentration of nitrate and phosphate is known, the mixed solution can be compared with the data detected by the microwave solution sensor to further obtain whether the detection precision of the microwave solution sensor is accurate or not, so that the calibration of the microwave solution sensor is realized.
In operation, the clean water inlet 47 is used for introducing deionized water, the detection inlet 49 and the liquid inlet 44 are respectively introduced with nitrate solution and phosphate solution, and the nitrate solution, the phosphate solution and the deionized water are mixed in the liquid storage tank 40 to form a mixed liquid with a required concentration.
The injection of the solution was performed using a microinjection pump.
Example III
As shown in fig. 1 to 3, a microwave solution detection system comprises a microwave solution sensor, a vector network analyzer and a microinjection pump, wherein the vector network analyzer is respectively connected with two ends of a transmission line 2; the microinjection pump is connected to the liquid inlet 44.
During detection, the industrial wastewater is injected into the liquid inlet 44 by the microinjection pump, enters the microfluidic channel 4 through the liquid inlet 44, and is subjected to concentration detection by the vector network analyzer through the SRR resonator.
When in calibration, four microinjection pumps are arranged, the four microinjection pumps are respectively connected with a liquid inlet 44, a detection inlet 49, a clear water inlet 47 and an air inlet 48, standard nitrate and phosphate solutions are injected into the microinjection pumps at a fixed flow rate under the action of the microinjection pumps, and meanwhile, proper deionized water is injected for dilution, so that 16 nitrate and phosphate mixed solutions with different concentrations are prepared, and the mixed solutions are fully mixed in a liquid storage tank 40 and then flow into a microfluidic channel 4 for detection.
As shown in fig. 5, a microwave solution sensor detects 16 mixed nitrate and phosphate solutions, and as shown in a detection spectrum diagram and a phase diagram in fig. 3, the three resonators have approximately the same change trend of the mixed solution detection, but have different sensing capacities, and PCA main component analysis is performed on the basis of insertion loss amplitude and phase, so that the result shows that good detection isolation can be realized between 16 mixed solutions, and trace, real-time and non-contact specific detection of the nitrate and phosphate mixed solutions in industrial wastewater can be realized.
The technical principle of the present utility model is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the utility model and should not be taken in any way as limiting the scope of the utility model. Other embodiments of the utility model will occur to those skilled in the art from consideration of the specification and practice of the utility model without the need for inventive faculty, and are within the scope of the claims.
Claims (9)
1. A microwave solution sensor, comprising a substrate (1) and a plurality of SRR resonators with different specifications, characterized in that it further comprises:
a transmission line (2), wherein the transmission line (2) is arranged on the substrate (1), and a plurality of SRR resonator arrays are arranged on the transmission line (2); a kind of electronic device with high-pressure air-conditioning system
The micro-fluidic channel (4), micro-fluidic channel (4) is installed on base plate (1), and is located one side of transmission line (2), micro-fluidic channel (4) are in including a plurality of detection runner and setting up inlet (44) and liquid outlet (45) at detection runner both ends, detection runner with the SRR syntonizer sets up relatively, is used for detecting detect the concentration of nitrate and phosphate of solution in the detection runner.
2. A microwave solution sensor according to claim 1 wherein the detection flow path comprises:
a first flow passage (41), wherein the first flow passage (41) is communicated with the liquid inlet (44);
-a second flow channel (42), said second flow channel (42) communicating with said first flow channel (41); a kind of electronic device with high-pressure air-conditioning system
A third flow passage (43), the third flow passage (43) being in communication with the second flow passage (42) and the liquid outlet (45), respectively;
the first flow channel (41), the second flow channel (42) and the third flow channel (43) are all concave, and the widths of the first flow channel (41), the second flow channel (42) and the third flow channel (43) are sequentially reduced and are sequentially arranged along the transmission line (2);
the SRR resonators are arranged in three and are respectively in one-to-one correspondence with the first flow channel (41), the second flow channel (42) and the third flow channel (43).
3. A microwave solution sensor according to claim 2, wherein the SRR resonator comprises a first resonator (31), a second resonator (32) and a third resonator (33) with successively decreasing frequencies, the first resonator (31), the second resonator (32) and the third resonator (33) being in one-to-one correspondence with the first flow channel (41), the second flow channel (42) and the third flow channel (43), respectively.
4. A microwave solution sensor according to claim 3, characterized in that the frequencies of the first resonator (31), the second resonator (32) and the third resonator (33) are 3-4 GHz, 4-5 GHz and 5-6 GHz, respectively.
5. A microwave solution sensor in accordance with claim 2, further comprising:
a first passage (461), wherein the first passage (461) is respectively communicated with the first flow passage (41) and the liquid inlet (44);
-a second channel (462), said second channel (462) being in communication with the bottom of said first flow channel (41) and the bottom of said second flow channel (42), respectively; a kind of electronic device with high-pressure air-conditioning system
-a third channel (463), said third channel (463) communicating with the top of the second flow channel (42) and the top of the third flow channel (43), respectively.
6. A microwave solution sensor as claimed in any one of claims 1 to 5, further comprising:
a clear water inlet (47), wherein the clear water inlet (47) is communicated with the microfluidic channel (4) and is used for introducing cleaning liquid to clean the microfluidic channel (4); a kind of electronic device with high-pressure air-conditioning system
And the air inlet (48) is communicated with the microfluidic channel (4) and is used for introducing air to dry the microfluidic channel (4).
7. The microwave solution sensor of claim 6, further comprising:
a detection inlet (49), wherein the detection inlet (49) and the liquid inlet (44) are used for respectively introducing nitrate solution and phosphate solution; a kind of electronic device with high-pressure air-conditioning system
A liquid storage tank (40), wherein the liquid storage tank (40) is communicated with the microfluidic channel (4), and the liquid inlet (44), the detection inlet (49), the clear water inlet (47) and the air inlet (48) are all communicated with the liquid storage tank (40);
the clean water inlet (47) is used for introducing deionized water, and the liquid storage tank (40) is used for mixing the nitrate solution, the phosphate solution and the deionized water to obtain a mixed solution of nitrate and phosphate with preset concentration.
8. A microwave solution sensor according to claim 1, characterized in that the substrate (1) is a teflon substrate (1).
9. A microwave solution detection system, comprising:
a microwave solution sensor as recited in claim 1;
the vector network analyzer is connected with two ends of the transmission line (2); a kind of electronic device with high-pressure air-conditioning system
And the microinjection pump is connected with the liquid inlet (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321273208.1U CN220154309U (en) | 2023-05-24 | 2023-05-24 | Microwave solution sensor and detection system thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321273208.1U CN220154309U (en) | 2023-05-24 | 2023-05-24 | Microwave solution sensor and detection system thereof |
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| CN220154309U true CN220154309U (en) | 2023-12-08 |
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| CN202321273208.1U Active CN220154309U (en) | 2023-05-24 | 2023-05-24 | Microwave solution sensor and detection system thereof |
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